Update Basic Pipeline example (#782)

update pipelineparam

samples/notebooks/Lightweight Python components - basics.ipynb

@@ -184,7 +184,7 @@
    "metadata": {},
    "source": [
     "#### Define the pipeline\n",
-    "Pipeline function has to be decorated with the `@dsl.pipeline` decorator and the parameters must have default values of type `dsl.PipelineParam`"
+    "Pipeline function has to be decorated with the `@dsl.pipeline` decorator"
    ]
   },
   {
@@ -199,9 +199,9 @@
     "   description='A toy pipeline that performs arithmetic calculations.'\n",
     ")\n",
     "def calc_pipeline(\n",
-    "   a=dsl.PipelineParam('a'),\n",
-    "   b=dsl.PipelineParam('b', value='7'),\n",
-    "   c=dsl.PipelineParam('c', value='17'),\n",
+    "   a='a',\n",
+    "   b='7',\n",
+    "   c='17',\n",
     "):\n",
     "    #Passing pipeline parameter and a constant value as operation arguments\n",
     "    add_task = add_op(a, 4) #Returns a dsl.ContainerOp class instance. \n",
@@ -278,7 +278,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.4"
+   "version": "3.7.0"
   }
  },
  "nbformat": 4,